Evidently from both of these examples, any jeans items tend to lend a casual vibe to any outfit. Nothing says relaxed and laid-back quite like the traditional denim as it doesn't overwhelm an outfit like other items might. These white dresses would look just as adorable by itself, but for the extra warmth during the cooler days, a denim jacket goes flawlessly with an otherwise all white ensemble to keep you warm whilst still looking stylish.